Scientific Linux 6
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Install/Configure Postfix
2011/03/20
  Install Postfix to configure SMTP Server. This example shows to configure SMTP-Auth to use Dovecot's SASL function.

[1] Install and Configure Postfix
[root@mail ~]#
vi /etc/postfix/main.cf


# line 75: uncomment and specify hostname

myhostname =
mail.srv.world


# line 83: uncomment and specify domain name

mydomain =
srv.world


# line 99: uncomment

myorigin = $mydomain

# line 116: change

inet_interfaces =
all


# line 119: change if you use only IPv4

inet_protocols =
ipv4


# line 164: add

mydestination = $myhostname, localhost.$mydomain, localhost
, $mydomain


# line 264: uncomment and specify your LAN

mynetworks = 127.0.0.0/8,
10.0.0.0/24


# line 419: uncomment (use Maildir)

home_mailbox = Maildir/

# line 545: uncomment, line 546: add

header_checks = regexp:/etc/postfix/header_checks
body_checks = regexp:/etc/postfix/body_checks


# line 571: add

smtpd_banner = $myhostname ESMTP


# add at the last line

# limit an email size 10M

message_size_limit = 10485760

# limit mailbox 1G

mailbox_size_limit = 1073741824


# for SMTP-Auth settings

smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
smtpd_client_restrictions = permit_mynetworks, reject_unknown_client, permit
smtpd_recipient_restrictions = permit_mynetworks, permit_auth_destination, permit_sasl_authenticated, reject


[root@mail ~]#
vi /etc/postfix/header_checks


# add at the head

# reject if email address is empty

/^From:.*<#.*@.*>/ REJECT
/^Return-Path:.*<#.*@.*>/ REJECT


[root@mail ~]#
vi /etc/postfix/body_checks


# reject if includes 'example.com' in mail body

/^(|[^>].*)example.com/ REJECT


[root@mail ~]#
/etc/rc.d/init.d/postfix start

Starting postfix:
[  OK  ]

[root@mail ~]#
chkconfig postfix on

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